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No. 62|,306. Patented Mar. I4, i899. C. L. KNEELAND &. W. C. HARTMANN.

(Application filed Apr. 13, 1898.)

(No Model.)

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N lTFD STATES `ATEN'I l F FIC HARLES L. KNEELAND AND VILLIAM C. HARTMANN, OF LANSING, MICHI- GAN; SAID HARTMANN ASSIGNOR TO SAID KNEELAND; SAID KNEELAND ASSIGNOR OF ONE-HALF TO GUY IV. RENYX, OF SAME PLACE.

CENTRIFUGAL CREAM-SEPARATOR.

SPECIFICATION forming part of Letters Patent N0. 621,306, dated March 14, 1899.

Application filed April I3, 1898. Serial No. 677,406. (No model.)V

To all whom, t may concern: phragm, and G is a cream-outlet tube com- 5o Beit known that we,CHARLEs LKNEELAND municating with the space above the diaand VILLIAM O. HARTMANN, citizens of the phragm and passing out through an aperture United States, residing at Lansing, in the in the hub C. The effect of this construction county of Ingham and State of Michigan, have is to force the separated blue milk into the invented certain new and useful Improveoutlet-passageFfrom the extreme outer circle ments in Centrifugal Separators, of which the of the bowl, where it is least liable to be mixed following is a specification, reference being with any cream, and as the'milk is drawn had therein to the accompanying drawings. uniformly from all sides of the bowl there is ro The invention relates more particularly7 to no tendency to form a circulatory current.

that class of separators especially designed To further increase the skimming effect, we 6o for separating full milk into blue milk and preferably arrange a second diaphragm H, in cream; and the invention consists in the pethe shape of an inverted cone, above the diaculiar construction of a nal separating or phragm E, its upper edge extending within a 15 skimming device arranged in proximity to short space from the wall of the bowl and its the outlet-passages from the bowl and adaptlower edge to near the circle of the creamed to more thoroughly eliminate from each of outlet. The lower inner portion of this diathe products any trace of the other which :phragm is provided with a series of apertures may remain after the separation effected in I. This diaphragm will act in a similar manzo the body of the bowl. ner, causing the milk to pass to the extreme In the drawings, Figure lis a longitudinal margin of this bowl before it can enter the 7o section through the lower portion of a sepaspace beneath; but it has the further funcrating-bowl, showing our improvement aption of forming an annular pool or still-well plied thereto. Fig. 2 is a cross-section on J beneath the diaphragm, in which anytrace 25 line Fig. l. Fig. 3 is a perspective view of cream that may remain will again be subofthe skimmer detached. jected to the centrifugal action and forced Ais the separating-bowl, of which the lower inward, passing through the apertures I to portion only is shown in the drawings, the thecream-outlet. At the same timeany blue invention relating solely to the construction milk which may remain with the cream on 3o of that portion. At or near the bottom of the upper side of the diaphragm will be given the bowl is formed in the side walls thereof another opportunity to escape through the 8o an annular groove or channel, preferably by apertures I into the pool J. The diaphragm providing the bowl with a detachable bottom E will then operate in the manner before dehaving the upwardly extending annular scribed to eifect the final separation.

35 flange screwed or otherwise secured to the For the milk-outlet we preferably form a body portion of the bowl and forming an ennumber of passages F, arranged around equilarged chamber beneath said body portion. distant from the centers, and to direct the The bottom Bis provided with a downwardlymilk to these passages we arrange wings K projecting hub O, which is mounted upon a below the diaphragm E, extending inward 4o spindle D. and inclined slightly backward in relation to E isadisk or false bottom arranged slightly the direction of rotation of the bowl. These above the bottom of the bowl and extending diaphragms will direct the milk inward sepacompletely across beneath the chamber rately to each of the outlets and also assists formed in the body of the bowl, but leaving a in forcing the Iiow.

45 peripheral passage-way connectingthe spaces What we claim .as our invention isabove and below said false bottom formed 1. In a centrifugal separator, a rotatable l by the annular groove in the side walls. bowl, provided with a false bottom extending F is a milk-outlet passage or passages comcompletely across beneath the chamber in the municating with the space beneath the diabody of the bowl, said bowl having formed in its side walls, an annular channel surrounding said false bottom and forming a peripheral passage connecting the spaces above and below the same, and the bottom of said bowl having formed therein an outlet-passage connecting with the space beneath said false bottom, and a tube forming a second passage passing through said false bottom and communicating with the space thereabove.

2. In a centrifugal separator the combination of the bowl, a diaphragm varranged to form a false bottom in said bowl with an annular marginal passage communicating with one outlet and said bowl having a second separate outlet passage through said diaphragm, a second inverted conical diaphragm having passages formed therethrough around its lower end and a narrow annular marginal passage around its upper end for the purpose described.

3. The combination with the bowl having a number of outlet-passages F in the bottom thereof, of the diaphragm E arranged within the bowl slightly above the bottom thereof forming a narrow marginal passage connecting the spaces above and below the same, the wings K dividing the space beneath said diaphragm and adapted to direct the liquid t0- ward the outlets F, the tube G passing through the diaphragm and through the bottom of the bowl and the inverted conical diaphragm H having the apertures L at its lower end and forming a narrow marginal passage at its upper end for the purpose described.

In testimony whereof we aix our signa tures in presence of two witnesses.

CHARLES L. KNEELAND. WILLIAM C. HARTMANN.

Witnesses:

LIDA I-IAvENs, GUY W. RENYX. 

